Hi, Would you please try the following patch?
-liubo From: Liu Bo <[email protected]> Subject: [PATCH] Btrfs: fix to use the right trans for async commit @trans has been freed and is undefined, and we should use the trans handle created for async commit instead. Signed-off-by: Liu Bo <[email protected]> --- fs/btrfs/transaction.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 8c81bdc..648d839 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1494,7 +1494,7 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, * Tell lockdep we've released the freeze rwsem, since the * async commit thread will be the one to unlock it. */ - if (trans->type < TRANS_JOIN_NOLOCK) + if (ac->newtrans->type < TRANS_JOIN_NOLOCK) rwsem_release( &root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1], 1, _THIS_IP_); -- 1.8.1.4 On Tue, Nov 05, 2013 at 09:34:01AM +0800, majianpeng wrote: > On the mainline linux tree, the head of git is :be408cd3e1fef73e9408b196a7. > > [ 2372.462131] > [ 2372.462147] ===================================== > [ 2372.462171] [ BUG: bad unlock balance detected! ] > [ 2372.462191] 3.12.0+ #32 Tainted: G W > [ 2372.462209] ------------------------------------- > [ 2372.462228] ceph-osd/14048 is trying to release lock (sb_internal) at: > [ 2372.462275] [<ffffffffa022cb10>] > btrfs_commit_transaction_async+0x1b0/0x2a0 [btrfs] > [ 2372.462305] but there are no more locks to release! > [ 2372.462324] > [ 2372.462324] other info that might help us debug this: > [ 2372.462349] no locks held by ceph-osd/14048. > [ 2372.462367] > [ 2372.462367] stack backtrace: > [ 2372.462386] CPU: 2 PID: 14048 Comm: ceph-osd Tainted: G W > 3.12.0+ #32 > [ 2372.462414] Hardware name: To Be Filled By O.E.M. To Be Filled By > O.E.M./To be filled by O.E.M., BIOS 080015 11/09/2011 > [ 2372.462455] ffffffffa022cb10 ffff88007490fd28 ffffffff816f094a > ffff8800378aa320 > [ 2372.462491] ffff88007490fd50 ffffffff810adf4c ffff8800378aa320 > ffff88009af97650 > [ 2372.462526] ffffffffa022cb10 ffff88007490fd88 ffffffff810b01ee > ffff8800898c0000 > [ 2372.462562] Call Trace: > [ 2372.462584] [<ffffffffa022cb10>] ? > btrfs_commit_transaction_async+0x1b0/0x2a0 [btrfs] > [ 2372.462619] [<ffffffff816f094a>] dump_stack+0x45/0x56 > [ 2372.462642] [<ffffffff810adf4c>] print_unlock_imbalance_bug+0xec/0x100 > [ 2372.462677] [<ffffffffa022cb10>] ? > btrfs_commit_transaction_async+0x1b0/0x2a0 [btrfs] > [ 2372.462710] [<ffffffff810b01ee>] lock_release+0x18e/0x210 > [ 2372.462742] [<ffffffffa022cb36>] > btrfs_commit_transaction_async+0x1d6/0x2a0 [btrfs] > [ 2372.462783] [<ffffffffa025a7ce>] btrfs_ioctl_start_sync+0x3e/0xc0 [btrfs] > [ 2372.462822] [<ffffffffa025f1d3>] btrfs_ioctl+0x4c3/0x1f70 [btrfs] > [ 2372.462849] [<ffffffff812c0321>] ? avc_has_perm+0x121/0x1b0 > [ 2372.462873] [<ffffffff812c0224>] ? avc_has_perm+0x24/0x1b0 > [ 2372.462897] [<ffffffff8107ecc8>] ? sched_clock_cpu+0xa8/0x100 > [ 2372.462922] [<ffffffff8117b145>] do_vfs_ioctl+0x2e5/0x4e0 > [ 2372.462946] [<ffffffff812c19e6>] ? file_has_perm+0x86/0xa0 > [ 2372.462969] [<ffffffff8117b3c1>] SyS_ioctl+0x81/0xa0 > [ 2372.462991] [<ffffffff817045a4>] tracesys+0xdd/0xe2 > [ 2709.388375] btrfs: device fsid 983de968-d6a9-4ca9-bd27-2be472d15b9b devid > 1 transid 26 /dev/sdb > [ 2709.394532] btrfs: disk space caching is enabled -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
